Chapter 1. Introduction. Following the same people over time to better understand family behaviour and its consequences: Arnaud Régnier-Loilier -- Chapter 2. The French GGS Survey and a Review of Its First Six Years: Arnaud Régnier-Loilier -- Chapter 3. Conjugal Outcomes of Different Types of Non-Cohabiting Relationships: Arnaud Régnier-Loilier -- Chapter 4. Frequency of Disagreements, Satis…